The pomological characterization of walnut (Juglans regia L.) to select the superior genotypes – An opportunity for genetic improvement

Khadivi, Ali; Montazeran, Arefeh; Rezaei, Mehdi; Ebrahimi, Aziz

doi:10.1016/j.scienta.2018.12.054

Cited by 24 publications

(14 citation statements)

References 23 publications

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“…Fruit height varied from 34.35 to 45.14 mm. These values are consistent with Mahmoodi et al, (2019), but are lower than Khadivi et al, (2019). Nut width is worthy for growers who accept a minimum grade of 32.0 mm, and bigger nut diameter means more income for growers.…”

Section: Morphometric and Phenological Characterssupporting

confidence: 75%

Morphometric Traits and iPBS Based Molecular Characterizations of Walnut (Juglans regia L.) Genotypes

Başak

Özer

Muradoğlu

2021

Preprint

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In this study, walnut genotypes that selected during two growing seasons among thousands of seedlings were analyzed in terms of detailed morphometric, phenological, and chemical traits. A multivariate analysis was conducted with valuable traits for breeding and selection such as morphometric traits, chemical composition, and phenological characteristics. Also, genotypes were characterized by a retrotransposon-based iPBS marker system. The correlation analysis showed significant positive and negative correlations between agro-morphological characters. The principal component analysis explained 71.44% of the total variance into five main components. Principal component and hierarchical cluster analysis divided genotypes into three groups, whose subgroups were identified based on both agro-morphological characters and iPBS marker systems. A high level of polymorphism ratio was observed for tested markers. Mantel’s test demonstrated relatively low correlations between molecular and morphological treats (r=0.04). The genetic similarities among all individuals ranged from 0.39 (between 018 and 015 or 045 genotypes) to 0.98 (between 090 and 094 genotypes) with a mean similarity of 0.67. Remarkable phenotypic and molecular variations were observed among the genotypes. The features of some investigated genotypes were above the acceptable thresholds for walnut selection in breeding programs and our study indicated that iPBS markers can be beneficial in walnut breeding programs, allowing the evaluation of the genetic relationship between genotypes, helping to differentiate and select the best genotypes to improve agronomic properties.

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Section: Morphometric and Phenological Characterssupporting

confidence: 75%

Morphometric Traits and iPBS Based Molecular Characterizations of Walnut (Juglans regia L.) Genotypes

Başak

Özer

Muradoğlu

2021

Preprint

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“…Thus, these key variables are the main traits accounting for kernel percentage, and they should be considered together in breeding with aiming increasing kernel percentage. Significant regression associations between kernel percentage and nut and kernel weights have been previously reported with MRA in walnut (Khadivi et al., 2019a; Khadivi‐Khub et al., 2015a, b).…”

Section: Resultsmentioning

confidence: 66%

“…Kernel weight showed positive and significant correlations with nut length ( r = 0.45), nut width ( r = 0.68), nut weight ( r = 0.83), kernel length ( r = 0.59), and kernel width ( r = 0.50), and agreed with others (Bayazit, 2012; Gahsemi et al, 2012; Cosmulescu & Botu, 2012; Mahmoodi et al., 2016; Poggetti et al., 2017; Khadivi et al, 2019b; Akça et al., 2020). Kernel percentage was negatively and significantly correlated with shell thickness ( r = ‐ 0.30), shell hardness ( r = ‐ 0.42), ease of kernel removal from nuts ( r = ‐ 0.39), and kernel shriveling ( r = ‐ 0.20), while it was positively and significantly correlated with kernel length ( r = 0.17), kernel width ( r = 0.30), kernel weight ( r = 0.50), kernel filled ( r = 0.46), and kernel plumpness ( r = 0.41) and was in line with the previous findings (Sharma & Sharma, 1998; Cosmulescu & Botu, 2012; Khadivi et al., 2019a,b; Khadivi‐Khub, 2014; Khadivi‐Khub et al., 2015a,b.…”

Section: Resultsmentioning

confidence: 99%

“…In the breeding programs, for selection of an ideal walnut genotype, breeders should consider the most important commercial characters, including nut weight (≥12.00 g), kernel weight (≥6.00 g), kernel percentage (≥50.00%), shell thickness (0.70–1.50 mm), easier kernel removal from nuts, clean, strong, and thin shell, and light, clean, and plump kernel (Aslantas, 2006; Cosmulescu & Botu, 2012; Khadivi et al., 2019a, b; Khadivi‐Khub et al., 2015a, b; McGranahan & Leslie, 1990; Poggetti et al., 2017; Sharma & Sharma, 1998). Thus, 15 genotypes with having the threshold of the above characters were selected (Table 5).…”

Section: Resultsmentioning

confidence: 99%

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Identification of the promising Persian walnut (Juglans regia L.) genotypes among seedling‐originated trees

Mirmahdi

Khadivi

2021

Food Science & Nutrition

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Considerable genetic diversity among the native populations of Persian walnut (Juglans regia L.) provides a great opportunity to identify genotypes with valuable traits. In the present study, morphological and pomological diversity assessments of 362 walnut seedling origin genotypes were performed to identify superior genotypes. Significant differences were observed among the genotypes investigated in terms of the evaluated characters. Nut weighted from 5.53 to 19.24 g with an average of 10.67. The range of kernel weight was 1.78–9.28 g with an average of 4.83. Kernel percentage in 107 out of 362 genotypes studied was more than 50.00%. Multiple regression analysis (MRA) showed that kernel percentage was associated with kernel weight, nut weight, kernel filled, nut width, and shell thickness. Principal component analysis (PCA) showed that the characters related to nut and kernel size were correlated with the first component (PC1). Hierarchical cluster analysis (HCA) showed that the genotypes were clustered into two major clusters. Based on the most important commercial characters considered by breeders to select ideal walnuts, 15 superior genotypes were selected and are recommended for cultivation in the orchards and also can be used in breeding programs.

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“…Morphological markers are practical, so they have been applied in breeding programs to study genetic diversity (Barros et al, 2019;Mangosongo et al, 2019;Shahid et al, 2019;Piña et al, 2010); selection outstanding hybrids (Khadivi et al, 2019), and interspecific hybrids evaluation (Santos et al, 2012).…”

mentioning

confidence: 99%

Morphological Variability of Eustoma Hybrids Obtained From Interspecific Crosses Between Eustoma Grandiflorum X Eustoma Exaltatum

Yulemne¹,

Rodrigo²,

Alberto³

et al. 2020

IJAR

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The morphological characteristics of hybrid lines obtained from interspecific crosses between Eustoma grandiflorum and Eustoma exaltatum were analyzed based on the descriptors reported by UPOV for Eustoma grandiflorum. In the principal component analysis, a variation of 73.70% was obtained within four main components. The hybrids of the genus Eustoma were grown in weather conditions with temperature up to 44.5°C in Yucatan Mexico. The 1512063, 1512096, 1512098, and 1512100 hybrids showed a good development plant height, number of nodal segments, flower number and flower size, so that these hybrids could be cultivated tropical regions for commercial purposes.

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The pomological characterization of walnut (Juglans regia L.) to select the superior genotypes – An opportunity for genetic improvement

Cited by 24 publications

References 23 publications

Morphometric Traits and iPBS Based Molecular Characterizations of Walnut (Juglans regia L.) Genotypes

Morphometric Traits and iPBS Based Molecular Characterizations of Walnut (Juglans regia L.) Genotypes

Identification of the promising Persian walnut (Juglans regia L.) genotypes among seedling‐originated trees

Morphological Variability of Eustoma Hybrids Obtained From Interspecific Crosses Between Eustoma Grandiflorum X Eustoma Exaltatum

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